Untitled
unknown
c_cpp
a year ago
182 B
6
Indexable
Never
#include <iostream> using namespace std; int main() { long long int i, j, sum; cin >> i >> j; sum = ((j*j) + j - (i*i) + i) / 2; cout << sum << endl; return 0; }
#include <iostream> using namespace std; int main() { long long int i, j, sum; cin >> i >> j; sum = ((j*j) + j - (i*i) + i) / 2; cout << sum << endl; return 0; }